/**
 * Copyright (c) 2006 George Malamidis, nutrun.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies
 * or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * $Author$
 * $Rev$
 */

package aerie.controller;

import aerie.filter.Filter;
import aerie.response.Responder;
import aerie.servlet.RequestBinding;
import groovy.util.ResourceException;

import java.util.Iterator;
import java.util.List;

public class ControllerHandler {

    public void execute(RequestBinding requestBinding) throws ResourceException {

        try {
            final Controller controller = requestBinding.getController();

            applyFilters(requestBinding.getFiltersForRequest(), controller);

            controller.invokeAction();

            final Responder responder = controller.getResponder();

            if (responder == null) {
                throw new RuntimeException("An Action must either RENDER, REDIRECT or FORWARD");
            }

            responder.respond();

        } catch (Exception e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    private void applyFilters(List filters, Controller controller) {
        //noinspection ForLoopReplaceableByForEach
        for (Iterator it = filters.iterator(); it.hasNext();) {
            ((Filter) it.next()).applyTo(controller);
        }
    }

}
